The manuscript describes a novel and efficient transition-metal-free approach to substituted phenols from simple and readily available cyclohexenones and cyclohexanones. Dimethyl sulfoxide (DMSO), the simple and common organic reagent, was...
Herein, we describe a catalytic asymmetric intramolecular vinylogous aldolreaction by taking advantage of dual organocatalysts, which enables convergent synthesis of ortho-fused tricyclic diketones in excellent enantioselectivities and diastereoselectivities. Noteworthy is that the reaction stereoselectively forges three consecutive stereogenic carbon centers including a quaternary one. Density functional
Pd(<scp>ii</scp>)-Catalyzed tandem selective dehydrogenative [4+2] annulation of 2-methyl-1,3-cycloalkanediones with olefins
作者:Xu Zhang、Di Wang、Mengfan Chang、Xuefeng Xu、Wenguang Li、Wanya Wang
DOI:10.1039/d3cc05191a
日期:——
A practical and effective palladium-catalyzed selective dehydrogenative [4+2] annulation of 2-methyl-1,3-cycloalkanediones with olefins was reported. The active 2-methylene-1,3-cycloalkanedione was in situ generated via Pd-catalyzed enolate oxidation processes, and it subsequently reacted with a wide variety of olefins to afford various polysubstituted dihydropyran derivatives in good to excellent
A polarizing plate composition, a polarizing plate protective film, a polarizer, a polarizing plate, and a liquid crystal display device contain a compound represented by the following Formula (I).
In Formula (I), R represents a specific substituent, and each of EWG1 and EWG2 represents an electron-withdrawing group. EWG1 and EWG2 may form a ring by being bonded to each other. Here, there is no such case where EWG1 and EWG2 become the following group by being bonded to each other and form a ring by being bonded to a carbon atom substituted with R.
Each of Rx and Ry represents a hydrogen atom or a substituent. * represents a position of bonding to a carbon atom substituted with R.
一种偏光板组合物、偏光板保护膜、偏光板、偏光板和液晶显示装置含有下式 (I) 所代表的化合物。
在式(I)中,R 代表一个特定的取代基,EWG1 和 EWG2 分别代表一个抽电子基团。EWG1 和 EWG2 可通过相互键合形成一个环。在此,不存在 EWG1 和 EWG2 通过相互键合而成为下一个基团,并通过与被 R 取代的碳原子键合而形成环的情况。
Rx 和 Ry 各自代表氢原子或取代基。* 代表与被 R 取代的碳原子成键的位置。
CCCXXI.—4-Alkyl derivatives of 1-phenylcyclohexane-3 : 5-dione
作者:Ibrahim Hilmi el-Said Mattar、John James Hunter Hastings、Thomas Kennedy Walker